product manual for welded low carbon steel cylinders … · 2021. 4. 16. · pm/ is 13258 / 2/...

PM/ IS 13258 / 2/ April 2021

PRODUCT MANUAL FOR WELDED LOW CARBON STEEL CYLINDERS

EXCEEDING 5 LITRES WATER CAPACITY FOR LOW PRESSURE LIQUEFIABLE GASES – REQUIREMENTS FOR INSPECTION AND

RECONDITIONING OF USED LPG CYLINDERS ACCORDING TO IS 13258: 2014

This Product Manual shall be used as reference material by all Regional/Branch Offices & licensees to ensure coherence of practice and transparency in operation of certification under Scheme-I of Bureau of Indian Standards (Conformity Assessment) Regulations, 2018 for various products. The document may also be used by prospective applicants desirous of obtaining BIS certification licence/certificate.

1. Product : IS 13258: 2014

Title

:

Welded Low Carbon Steel Cylinders Exceeding 5 Litre Water Capacity for Low Pressure Liquefiable Gases – Requirements for Inspection and Reconditioning of Used LPG Cylinders

No. of Amendments : 1

2. Sampling Guidelines:

a) Raw material : Please refer ANNEX- A

b) Grouping guidelines : Each Variety of Cylinders shall be tested for GoL/CSoL.

c) Sample Size : Please refer ANNEX- B

3. List of Test Equipment : Please refer ANNEX – C

4. Scheme of Inspection and Testing : Please refer ANNEX – D

5. Possible tests in a day: : Please refer ANNEX – E

6. Scope of the Licence: : Please refer ANNEX- F

7. Any other guidelines : Please refer ANNEX– G

BUREAU OF INDIAN STANDARDS Manak Bhawan, 9, Bahadur Shah Zafar Marg,

New Delhi – 110002 1

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ANNEX A

Raw Material

Raw Material Requirement

Foot ring, Stout metal cap shroud and stay plate

Grade ‘O’ of IS 1079 or IS 2062 or IS 6240

(Any other material as approved by the statutory authority may also be used)

Valve fittings IS 8737

Zinc wire IS 12447

Primer IS 12744 - for enamel paint IS 13238 - for Poly Urethane paint

Paint IS 2932 or IS 13213

Powder Coating IS 13871

V. P. Ring As per approved design

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ANNEX B

Sample Size

For considering grant of licence/inclusion of additional varieties, a trial batch of prototype cylinders as per the approved drawings shall be manufactured during the joint inspection of BIS and Statutory Authority after in-principle approval is received from the statutory authority. Unless otherwise stated by the statutory authority, the trial batch shall be of minimum one-hour production (heat treatment) of prototype cylinders in continuous cycle furnace or 56 prototype cylinders whichever is higher.

Detailed examination and reconditioning of all the cylinders of trial batch shall be done in accordance with Section 1 and Section 2 of IS 13258: 2014 during the joint inspection.

No sample of cylinder is required to be drawn for independent testing.

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ANNEX C

List of Test Equipment Major test equipments required to test as per the Indian Standard

Sl No.

Tests used in with clause reference Test Equipment(s)

1. Valve pad/bung – Cl. 15.1 Thread Plug Gauges

2. Straightness, Verticality – Cl. 9.1.2 Vernier caliper, Surface plate, Spirit level, Try square, Height Vernier gauge, Goose neck gauge, Ultrasonic thickness gauge

3. Foot ring – Cl. 9.1.4 Vernier caliper, Angle protector

4. Heat treatment – Cl. 13 Furnace with temperature recorder, graphs, thermocouples, temperature indicators

5. Hydrostatic test – Cl. 14 HST test setup with pressure gauges

6. Valve fixing and Pneumatic leakage test – Cl. 15, 16

Torque Wrench, Pressure gauge

7. Internal cleaning, drying - Cl 10.6 Rod fitted with light source (extra low voltage inspection lamp) at one end

8. Coating thickness - Cl 18.2 Elcometer

9. Exterior corrosion, Denting, Bulging, Gouges, Digs, Cl. 6.1

Scales, Depth gauges or Straight edge

The above list is indicative only and may not be treated as exhaustive.

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ANNEX D

Scheme of Inspection and Testing 1. LABORATORY - A laboratory shall be maintained which shall be suitably equipped (as per the requirement given in column 2 of Table 1) and staffed, where different tests given in the specification shall be carried out in accordance with the methods given in the specification.

1.1 The manufacturer shall prepare a calibration plan for the test equipments. The following

equipments shall be calibrated at a frequency shown against each and records kept: 1.1.1 Tensile Testing Machine - Once in a year 1.1.2 Pressure Gauges - At least once in a month 1.1.3 Pyrometer used for heat treatment furnace - Once in six months

1.2 QUALITY CONTROL- All units repairing and supplying cylinders shall obtain and hold valid Quality Management System certification in accordance with IS/ISO 9001from BIS to ensure that the manufacturer adheres to various steps during each stage of manufacturing process constantly.

2. TEST RECORDS – The manufacturer shall maintain test records for the tests carried out to establish conformity. Records of all the tests made at the cylinder manufacturer’s work shall be kept for the life time of the cylinder and copies of test certificates shall be forwarded to the purchaser of the cylinder and the inspecting authority.

2.1 In addition to above, the following documents shall be made available to the Inspecting Officer:

i) Document showing the approval of PESO for the de-gassing station and procedures as

per Clause 7.1 of IS 13258: 2014.

ii) Design document of all detachables for individual parts shall be in line with the approved drawing of the owner as detailed in their drawing as per clause 9.1 and 9.1.1 of IS 13258: 2014.

iii) Document showing approval of PESO for chemical cleaning as per Clause 10.2 of IS 13258: 2014.

iv) Document showing approval of PESO if internal cleaning is done with the use of solvent as per clause 10.3.1(b) of IS 13258: 2014.

v) Document showing approval of PESO if internal cleaning is done by blasting as per clause 10.3.2 (a) of IS 13258: 2014.

vi) Approval of PESO if any other colour of paint/ powder coating is used as per clause 18.1 of IS 13258: 2014.

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3.0 LABELLING AND MARKING– As per the requirements of IS 13258:2014. 3.1 In case the Licence Number (CM/L No.) of the original LPG Cylinder manufacturer on the foot ring and / or vertical stay plate of VP ring is not clear, it shall be stamped again on the foot ring and/ or Vertical stay plate.

4.0 CONTROL UNIT: For the purpose of this scheme, Batch shall be as under: 4.1 Batch – A batch shall consist of LPG cylinders of identical type and design from same owner offered for BIS lot inspection at a time.

4.2 The identity of each batch shall be maintained. 5. LEVELS OF CONTROL - The tests as indicated in column 1 of Table 1 and the levels of control in column 3 of Table 1 and the tests as per Annexure I shall be carried out on the whole production of the factory which is covered by this plan and appropriate records maintained in accordance with paragraph 2 above.

5.1 A certificate as per Annexure II shall be issued by the BIS Inspecting Officer in respect of every batch of cylinders marked with BIS Standard Mark.

6. HEAT TREATMENT-The heat treatment of the cylinders shall be done as per clause 13 of IS 13258: 2014 and records shall be maintained as per Table 8 of Annexure I.

6.1 Adequate care shall be taken to ensure the consistency of heat treatment cycle. The deviation of temperature shall be within the specified temperature range. In case the temperature goes outside the specified limits, furnace shall be stopped. Heat treatment shall be resumed only after attaining the requisite temperature and the furnace temperature is maintained between the specified limits. The complete records of heat treatment cycle and interruptions of cycle shall be maintained.

7. REJECTIONS – Disposal of non-conforming product shall be done in such a way so as to ensure that there is no violation of provisions of BIS Act, 2016. A separate record shall be maintained giving information relating to the rejection of the production not conforming to the requirements of specification and the method of its disposal. Such material shall in no case be stored together with that conforming to the Specification.

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TABLE 1

(1) (2) (3) Test Details Test

equipment Required

(R) or Sub- contracting permitted

(S)

Cl. Requirement Test Method No. of

samples Frequency Remarks

Clause Reference

9.1 Design and Drawing 9.1, 9.1.1 IS 13258 -- Drawings shall be approved by statutory authority. 8 Material 18.1 Zinc wire / Primer/

Paint/Powder Coating/ Grits

18.1 23

IS 13258 IS 3196 (Part 1)

S ---- Each consignment

Primer/Paint shall be ISI Marked. No further testing is required, if accompanied with test certificate or ISI Marked. The approved material as per drawing shall only be used.

15.1 Valve 15.1 IS 13258 S ---- Each consignment

Shall be ISI marked.

Foot ring/Stout metal Cap Shroud/ Stay plate VP Ring tube

8 IS 13258 S ---- Each consignment

The material shall be ISI Marked and the cylinder repairer shall obtain test certificates for each consignment. The approved material as per drawing shall only be used.

12 Receipt of cylinders before reconditioning

12 IS 13258 R Each cylinder Record shall be maintained as per Table 1 of Annexure I.

6.1 External inspection 6.1, 10.1 IS 13258 R Each cylinder Record shall be maintained as per Table 2 of Annexure I.

10 Detailed examination: 7 De-gassing of

cylinders 7.1, 7.2 IS 13258 R Each cylinder Records shall be maintained as per

Table 3 of Annexure I.

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10.2 External cleaning 10.2 IS 13258 R Each cylinder Record shall be maintained as per Table 3 of Annexure I.

10.3 Internal cleaning 10.3 IS 13258 R Each cylinder Record shall be maintained as per Table 3 of Annexure I.

10.4 Tare weight verification

10.4 IS 13258 R Each cylinder Record shall be maintained as per Table 4 of Annexure I.

10.5 External inspection and Verification of wall thickness

10.5.1, 10.5.1.1

IS 13258 R Each cylinder Record shall be maintained as per Table 5 of Annexure I.

10.6 Internal inspection 10.6 IS 13258 R Each cylinder Record shall be maintained as per Table 4 of Annexure I.

11 Segregation of cylinders

11.1, 11.2 IS 13258 R Each cylinder

12 Reconditioning Removal of Foot ring and Valve protection Ring

12.1 IS 13258 R Each cylinder

Checking of surface 12.1.1 IS 13258 R Each cylinder Record shall be maintained as per Table 6 of Annexure I

Grinding of surface and Verification of wall thickness

12.1.1, 10.5.1.1

IS 13258 R Each cylinder Record shall be maintained as per Table 6 of Annexure I

Fixing of new Foot ring and valve protection Ring / Shroud

9.1.2, 9.1.3, 9.1.4, 12.2

IS 13258 R Each cylinder Record shall be maintained as per Table 7 of Annexure I

13 Heat treatment 13.1, 13.2 IS 13258 R Each cylinder The cylinders shall be heat treated as per scheme of manufacture duly approved and a complete record of heat treatment cycle shall be maintained as per Table 8 of Annexure I. Also see Cl. 6 of SIT.

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14 Hydrostatic test 14.1, 14.1.1, 14.1.2

IS 13258 R Each cylinder Records shall be maintained as per Table 9 of Annexure I

15 Fixing of valve 15.1 IS 13258 R Each cylinder Records shall be maintained as per Table 10 of Annexure I.

16 Pneumatic test 16.1, 16.2 IS 13258 R Each cylinder Records shall be maintained as per Table 11 of Annexure I.

17 De-shaping of unserviceable cylinders

17 IS 13258 R Each cylinder Record shall be maintained as per Table 12 of Annexure I.

18 Preparation for Despatch: Preparation for despatch

18.1 23

IS 13258 IS 3196 (Part 1)

R Each cylinder Records shall be maintained as per Table 10 of Annexure I.

Grit blasting 18.1 23

IS 13258 IS 3196 (Part 1)

R Each cylinder Records shall be maintained as per Table 13 of Annexure I.

Zinc Coating 18.1 23

IS 13258 IS 3196 (Part 1)

R One cylinder out of every 50 cylinders

Records shall be maintained as per Table 13 of Annexure I.

Coating thickness 18.1 23

IS 13258 IS 3196 (Part 1)

R One cylinder out of every 50 cylinders

Records shall be maintained as per Table 13 of Annexure I.

19 Records 19 IS 13258 R Each cylinder Records shall be maintained as per Annexure I (Table 1 to Table 15)

Test Certificate shall be maintained as per Annexure II

20 Markings 20 IS 13258 R Each cylinder Records shall be maintained as per Table 15 of Annexure I

Note-1: Sub-contracting is permitted to a laboratory recognized by the Bureau or Government laboratories empanelled by the Bureau.

Note-2: The control unit and levels of control as decided by the Bureau are obligatory to which the licensee shall comply with.

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Date of receipt:

ANNEXURE I

Table 1- Record of incoming cylinders for Reconditioning

Name of owner: Document reference of owner: Max working pressure in MPa: Test pressure in MPa: Water capacity in litres:

Sl. No. Name of

cylinder manufactu rer

CM/L no of each cylinder

Batch no of each cylinder

Serial no of each cylinder

Month & year of manufacture of each cylinder

Gross weight in kg Tare weight in kg Presence of the symbol “R” on the vertical stay of VP ring or foot ring

Whether cylinder is serviceable or unserviceable

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

Note: At this stage, if Col. No. (2), (3), (4), (5) of Table 1 and Max. WP is not decipherable and the symbol R is present in Col No. (10), the cylinders shall be declared as unserviceable and shall be rejected.

Table 2- Record of External Inspection as per Cl. 6.1 of IS 13258

Date(s) of inspection:

Sl. No. of Type of Defect Whether serviceable cylinder is cylinders serviceable or

Unserviceable Bulge Dent Cut Intersecting Dent Crack Lamination Dig Bottom Foot ring Isolated Area General Line Cervice Depressed Arc Fire or cut or containing shell bottom corrosion corrosion corrosion corrosion corrosion bung or damage gouge gouge cut or thickness clearance pits torch

gouge burns

Note: Decision w.r.t unserviceability of the cylinders shall be taken based on the rejection criteria stipulated in Table 1 to Table 3 of IS 13258

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Table 3 – Record of de-gassing, external cleaning and internal cleaning as per Cl. 7, Cl. 10.2 and Cl. 10.3 respectively of IS 13258

Date(s) of degassing, external cleaning, internal cleaning:

Method of external cleaning: Method of internal cleaning:

Sl. No. of serviceable cylinders

If contamination by oil or similar fluid is observed, method of cleaning adopted

If cylinder is affected by rust or other foreign matter, method of cleaning adopted

Remarks

Steam cleaning or Approved solvent or Use of magnet

Approved blasting, rotary wire brushing or rumbling procedure or burnt out treatment* in furnace

* In the case of burnt out treatment, all free rust and scale shall be removed as per Cl. 10.3.1 of IS 13258 and records to be maintained.

Table 4 – Record of tare weight verification and internal inspection as per Cl. 10.4 and Cl. 10.6 respectively of IS 13258

Date of verification:


Tare weight as per Table 1 of Annexure I

Observed tare weight % loss in tare weight Internal inspection Whether cylinder is serviceable or unserviceable

Note: Decision w.r.t unserviceability of the cylinders shall be taken based on the rejection criteria stipulated in Cl. 10.4 and Cl. 10.6 of IS 13258

Table 5- Record of grinding of cylinders after external inspection to achieve a defect free surface as per Cl. 10.5 of IS 13258

Date of grinding:


Type of repairable defect as per Table 2 above Wall thickness after grinding acceptable or not Remarks

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Table 6 - Record of inspection of cylinders

Date of inspection:


Type of defect Wall thickness

Whether cylinder is serviceable/ repairable or unserviceable

Type of repairable defect (for repairable cylinders)

Record of grinding of cylinders declared as “Repairable” to achieve a defect free surface as per Cl. 10.5.1 of IS 13258: 2014

* Whether cylinder serviceable or not

Remarks

Date of grinding Wall thickness Line corrosion

Pits

* Decision w.r.t unserviceability of the cylinders shall be taken based on the rejection criteria stipulated in Cl. 10.5.1.1 of IS 13258

Table 7 - Record of Inspection of weld defects as Clause 12.2 of IS 13258

Date of inspection: Name of welder:


Conformity to welding checks as per Cl. 7 of IS 3196 (Part 1)

VP Ring [Check for weld as per clause of IS 3196 (Part 1)]

Foot ring and check for weld as per Cl. 10.2 of IS 3196 (Part 1) Straightness as per Cl. 9.1.2 of IS 13258

Verticality as per Cl. 9.1.2 of IS 13258


Cl. 9.3.1

Cl. 9.3.2

Cl. 9.3.3

Cl. 9.3.4

Type of weld/(shall be intermittent)

Position from circumferential weld

Thickness of sheet

If bottom edge is curled up

Holes for ventilation

Deviation from the vertical shell

Position of bottom ring

Table 8 - Record of Heat Treatment as per Cl. 13 of IS 13258

Approval of PESO: Stress relieving temperature: Duration in minutes:

Date: Name of operator: Shift:

Sl No. of serviceable cylinders Batch No./Quantity Time in Time out (From ------ To---------)

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Table 9 - Record of Hydrostatic test as per Cl. 14 of IS 13258

Batch No.: Test Pressure: 25 Kgf/cm2 Duration: 30 Seconds

Sl. No. of serviceable cylinders Reduction in pressure noticed Any leakage/visible bulge/ deformation


Note: Decision w.r.t unserviceability of the cylinders shall be taken based on the rejection criteria stipulated in Cl. 14 of IS 13258

Table 10-Record of bung thread cleaning and internal cleaning before fixing of valve as per Cl. 15 of IS 13258

Batch No.: Date of cleaning:

Sl. No. of Bung thread cleaning Internal cleaning for removal of: Whether cylinder is serviceable/ serviceable repairable or unserviceable cylinders Freedom Zinc Other Breaking Re-correction Water Grit Welding Flux Metal Any

from foreign of scale of distortion slag other grit matter foreign particles

Note: Decision w.r.t unserviceability of the cylinders shall be taken based on the rejection criteria stipulated in Cl. 15 of IS 13258

Table 11-Record of pneumatic test as per Cl. 16.1 of IS 13258: 2014

Batch No.: Quantity: Date of test: Air pressure: 12 Kgf/cm2 Duration: 1 minute

Sl. No. of serviceable cylinders Leakage observed Whether cylinder is serviceable or Unserviceable

Note: Decision w.r.t unserviceability of the cylinders shall be taken based on the rejection criteria stipulated in Cl. 16.1 of IS 13258

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Table 12- Record of de-shaping of unserviceable cylinders as per Cl. 17 of IS 13258

Batch number: Qty:

Sl. No. of un-serviceable cylinders

Sl. No. of cylinder of Manufacturer

Manufacturer’s identity

Date of rejection

Cause of rejection

Date of de-shaping

Table 13-Record of grit blasting, metalizing, painting coating thickness as per Cl. 18 of IS 13258

Batch No. Sl. No. From ---------- To ------------ Date:


Date of cleaning & drying

Date of grit blasting

Result OK/ Not OK

Minimum thickness of zinc

Use of Primer zinc chromate

Use of synthetic enamel paint/ PU paint

Use of powder coating or stoving primer coat and enamel coated

Total minimum thickness observed (67µ min.)

Remarks

1 2 3 4 5 Avg.

Table 14 - Record of reconditioning of cylinders Batch No.:

Date:

Sl. No. of cylinder Original Manufacturer’s name Date of manufacture Date of repair Details of repairs carried out

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Table 15 - Record of Marking

Cylinder No.

Original markings on the foot ring and vertical stay plates of V P Ring as applicable Marking on foot ring

Letter R on vertical stay plate as close to BIS Certification Mark

Remarks

Original Sl. No./ Batch No.

BIS Certification Mark, Manufacturer’s name or initials

Repairer’s identification Mark

New tare weight and gross weight of cylinder

Month & year of manufacture, retest and reconditioning

Maximum working pressure, test pressure in MPa

Water capacity

Loss in tare wt., if observed

Letter R for reconditioning

BIS Certification Mark and CM/L No. of repairer

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Annexure II

TEST CERTIFICATE

(Reconditioning and Testing of Used LPG Cylinders)

Name and address of repairer: Certificate No.: Date :

CM/L No.:

Owner (Name of the customer) : Order No. : Batch Number :

Cylinder description: litres water capacity, piece welded LPG cylinders, working pressure: Kgf/cm2/ MPa.

This is to certify that the LPG cylinders as per the details given above have been repaired as per details given in Appendix 1, re-inspected and tested at M/s.

These cylinders have passed all the requisite tests as specified in IS 13258:2014 and are declared fit for use.

Appendix 2 gives the list of cylinders segregated as unserviceable, rejected and scrapped.

Total Quantity passed:

Total Quantity rejected:

Details of Inspection and Testing:

i) Visual examination (External & Internal) ii) Stress relieving at oC maximum for minutes iii) Hydraulic pressure test at MPa. iv) Surface preparation, Metalizing and Painting. v) Checking of Bung threads and valve fixing vi) Pneumatic Test at MPa. vii) New Tare weight of the cylinder punched.

QUALITY CONTROL INCHARGE INSPECTING OFFICER OF THE FIRM BUREAU OF INDIAN STANDARDS

PM/ IS 13258/ 2/ April 2021

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APPENDIX 1

(LIST OF CYLINDERS ACCEPTED)

Repairer’s Name : Certificate number : Owner : Order number : Batch number : Date :

Sl. No. of cylinder

Original Manufacturer’s name/Identity

Date of manufacture/Test

Date of repair/Test

Details of repairs carried

out

QUALITY CONTROL INCHARGE INSPECTING OFFICER OF THE FIRM BUREAU OF INDIAN STANDARDS

APPENDIX 2

(LIST OF CYLINDERS UNSERVCEABLE)

Repairer’s Name : Certificate number : Owner : Order number : Batch number : Date :

Sl. No. of cylinder Original Manufacturer’s

name/Identity Date of

manufacture. Date of

rejection Reasons for

rejection

QUALITY CONTROL INCHARGE INSPECTING OFFICER

OF THE FIRM BUREAU OF INDIAN STANDARDS

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1. Hydrostatic test (Cl. 14)

ANNEX E

Possible Tests in a Day

2. Valve fixing and Pneumatic leakage test (Cl 15) 3. Internal cleaning and drying (Cl 10) 4. Tare weight (Cl 10.4) 5. Coating thickness (Cl 18.2) 6. Markings (Cl. 20)

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ANNEX F

Scope of Licence

“Licence is granted to use Standard Mark as per IS 13258: 2014 with the following scope:

Name of the product

Welded Low Carbon Steel Cylinders Exceeding 5 Litre Water Capacity for Low Pressure Liquefiable Gas – Requirements for Inspection and Reconditioning of Used LPG Cylinders

Variety Water capacity (litres)

Any other aspect PESO approved drawing number and approval number

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Annex G

Format for Lot inspection of Reconditioned LPG Cylinders according to IS 13258: 2014

1) Name of the Unit-

2) Licence Number-

3) Date of Lot Inspection –

4) Batch Number/ Control Unit –

Table – A Audit of Records

Sr. No.

Requirements Clause Reference of IS 13258: 2014

Test certificates Observation

01 Foot Ring 9.1.4 Test certificates Available/ Not available

Satisfactory/ Not Satisfactory

02 Valve Protection Ring

9 Test certificates Available/ Not available


03 Valves 15.1 Test certificates Available/ Not available


04 Calibration of Instruments

Calibration certificate Available/ Not available


05 Record of Stage Inspection

As per SIT/ Levels of Control

Stage Inspection Record Available/ Not available


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Table- B

Stage Auditing of Inspection and Reconditioning Process

Date of Lot Inspection :

Sr. No. Requirement / Stage Observations

1. External Cleaning Satisfactory/Not Satisfactory

2. Internal Cleaning Satisfactory/ Not Satisfactory

3. Tare weight Verification Satisfactory/ Not Satisfactory

4. External Inspection Satisfactory/ Not Satisfactory

5. Internal Inspection Satisfactory/ Not Satisfactory

6. Removal of Footring and Valve Protection Satisfactory/ Not Satisfactory

7. Fixing new Footring and Valve Protecting Ring/Shroud


8. Heat Treatment Satisfactory/ Not Satisfactory

9. Hydrostatic Test Satisfactory/ Not Satisfactory

10. Grit Blasting Satisfactory/ Not Satisfactory

11. Metalizing Coating Thickness Satisfactory/ Not Satisfactory/ N.A.

12. Primer Coating/ Paint Coating Satisfactory/ Not Satisfactory/ N.A.

13. Powder Coating Satisfactory/ Not Satisfactory/ N.A.

14. Tare Weight Satisfactory/ Not Satisfactory

15. Valve Fixing Satisfactory/ Not Satisfactory

16. Pneumatic Test Satisfactory/ Not Satisfactory

17. Deshaping Satisfactory/ Not Satisfactory

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Table- C

Inspection & Testing prior to the release of Batch

Sr. No.

Tests Clause Reference of IS 13258

Number of samples Observation

1. Valve fixing using approved jointing compound at specific torque

15.1 1 cylinder out of every 250 cylinders or part thereof an inspection lot

Satisfactory/Not Satisfactory

2. Pneumatic leakage test

16 1 cylinder out of every 250 cylinders or part thereof an inspection lot


3. Total minimum combined coating thickness

18.2 1 cylinder out of every 250 cylinders or part thereof an inspection lot


Coating:

Minimum: Maximum:

4. Markings 20 1 cylinder out of every 500 cylinders or part thereof an inspection lot


Remark:

1. Batch – Accepted / Not Accepted 2. Test Certificate – Enclosed

Deviations if any:

Signature of QCI Signature of BIS IO Name: Name & Designation: Date: Date:

product manual for welded low carbon steel cylinders … · 2021. 4. 16. · pm/ is 13258 / 2/...

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